I am sorry, I just installed LMDE. I love the rolling edition concept and I hope to solve the following question to adopt definitively LMDE. For my work I need of some packages, like opencv and libserial. But the manager refuse the full opencv installation and libserial is not listed. On the other hand these packages are in debian squeeze repo. What is the best way to install packages from debian squeeze or testing? Should I add the debian repo or is there a method to directly install a particular package? Thank you for any answer.